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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 33, No. 5, 2012, pp. 463-472
Bioline Code: zr12073
Full paper language: English
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 33, No. 5, 2012, pp. 463-472

 en DNA barcoding and species and subspecies classification within genus Carassius check for this species in other resources
CHENG, Lei; CHANG, Yu-Mei; LU, Cui-Yun; CAO, Ding-Cheng & SUN, Xiao-Wen

Abstract

The classification of Carassius check for this species in other resources has not been well established due to its great variability and wide distribution. Usually, Carassius is identified as three species: C. carassius check for this species in other resources , C. cuvieri check for this species in other resources and C. auratus check for this species in other resources , the latter including several subspecies, such as goldfish. Out of these subspecies, C. auratus gibelio check for this species in other resources have recently been thought of as a valid species of Carassius. In this study we collected the 5′end 651 bp segments of the mitochondrial cytochrome c oxidase I (COI) gene from 128 specimens, including C. carassius, C. cuvieri, C. auratus auratus, C. auratus gibelio and C. auratus langsdorfii check for this species in other resources . All three species of Carassius (C. carassius, C. cuvieri, C. auratus) were found to be valid, meanwhile genetic differentiation between the Eurasian C. auratus and Japanese C. auratus has reached a high level. However, several haplotypes were shared between C. auratus auratus and C. auratus gibelio. Consequently, C. auratus gibelio should be regarded as a subspecies of C. auratus rather than a valid species. Moreover, because both diploids and triploids exist in C. auratus auratus and C. auratus gibelio, ploidy level should not be used as criteria for the classification of species or subspecies in Carassius.

Keywords
Carassius; DNA barcode; COI gene; Species identification; C. auratus gibelio

 
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